The Italian tactician blamed a poor mental state for his side's 3-1 defeat to Roma on Sunday, bringing an end to the club's excellent start to the season
Goals from Alessandro Florenzo, Pablo Osvaldo and Marquinhos did the damage for the Nerazzurri, with Zdenek Zeman's side leaving Milan with a deserved three points.
"I did not like the second half, we had a great first half and then the goal by Osvaldo, on a long ball from Totti, found [us] a little unprepared - [It was] a lightning [quick] restart," the trainer told reporters after the game.
"Following the second goal, [we were] not good. This should make us reflect. Something has not gone right on a psychological level tonight."
Inter stalwart Javier Zanetti gave credit to Roma, but was disappointed with the lack of organisation from him and his team-mates.
"We knew that our opponents would be good at taking advantage of the space we would leave from time to time. It’s just that tonight we did it too frequently," he explained to the club's official website.